Survey and surveillance on rice false smut disease severity in Tamil Nadu and the influence of wind velocity on disease progression under field conditions

The false smut disease of rice incited by Ustilaginoidea virens is a major constraint on production. main aim the present study was to ascertain severity in both delta and non-delta districts Tamil Nadu through survey surveillance assess correlation between wind velocity for past three years, 2019, 2020 2021. Moreover, addressed distribution pattern diseases under field conditions. results obtained from revealed that maximum recorded Nagapattinam district (Nagapattinam block) with 27.45% minimum Theni (Bodinayakanur 8% Similarly 2019 following Thanjavur (Orathanadu 19.91% (Peravurani 18.54% Madurai (Madurai north 4.78% (Usilampatti respectively. R2 values regression analysis were 0.70, 0.79 0.76 2021, Besides relationship development, direction also assessed. By assessing conditions, more observed around surrounding area paddy as well diagonal path which clearly influences development.